United States military (1861): Civil War mass army

A republic that built a department and then an alliance system The US military's honest twentieth-century sentence is 1947 plus 1950 -- a legal department that went to war on the Korean peninsula before it had finished unpacking. No tactics of 1863 as a lesson to copy. A late entry in WW1; a global mobilisation in WW2. Marshall as the institutional builder; Eisenhower and Nimitz as the two-theatre faces. The bomb is an ICBM-and-WW2 file as well as this one.

A new department, a new air force, NATO (1949), then Korea. MacArthur's relief (11 April 1951) is a civil-military hinge, not a personality show only. Inchon belongs on its battle page; the alliance belongs here. All-volunteer force; Goldwater-Nichols; a long post-9/11 period already thick in public files. This page stops at institutional hinges and will not become a current campaign tracker or a SOF manual.

1973-86-present as history stays dated: 1941-45 (Global mobilisation) in A continental republic that became a global basing and alliance system after 1941. Dwight D. Eisenhower (General / president) is a named witness -- Europe's named Supreme Commander and a 1950s president of the alliance age -- including a Korea endgame in 1953 politics. Cost band: not one war -- an institution; human cost sits in the wars this atlas already files. Encyclopedia, not a method.